Ion initial azimuthal speed influence upon isotopes separation in the presence of constant axisymmetric radial-electric and azimuthal-magnetic fields, the strengths of which is inversely proportional to the distance from the axis - Kirochkin, A.Yu.; Kirochkin, Yu.A.; Lapshin, V.I.; Marinin, V.G.; Vlasov, V.V.; Volkov, E.D. (Вопросы атомной науки и техники, 2000)